Massac County RainfallUnited StatesILMassac County20%Metropolis 20% Chance 25%Brookport 25% Chance 15%Mermet Lake 15% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville